npm install -g typescript

tsc xxx.ts
node xxx.js

tsc -h
tsc demo.ts --outDir js 
node js/demo.js

# 07modules
tsc ZipCodeValidator.ts --outDir js 
node js/ZipCodeValidator.js
tsc AllValidators.ts --outDir js 
node js/AllValidators.js

# 08namespace
tsc demo2.ts --outDir js 
node js/demo2.js
tsc --outFile js/sample.js demo3/Test.ts
node js/sample.js

# when i was grown up 
# i will be stronger
# they call me crazy
# just like a waving flag


